Ventilator



Y. OGAWA 4 VENTILATOR Filed Nov.

April 21, 1931.

Zhvenbor: Yoahz'o Ojawa.

Patented Apr. 21, 1931 UNITED STATES PATENT OFFICE YOSHIO OGAWA, F NISHINOMIYA, JAIPAN VENTILATOB Application filed November 26, 1929, Serial No. 409,801, and in Japan December 3, 1928.

This invention relates to a ventilator comprising a revolving vane or vanes for drawing air into or from a room where the ventilator is provided, and is characterized by the fact that a number of guide vanes are provided around the revolving vane or vanes,

together with means for adjusting the guide vanes relative to the revolving vanes. The

object of this invention is to obtain a ventilator which can be used for drawing air into or from a room at will.

Fig. 1 is a sectional elevation of the ventilator according to this invention, and Fig. 2 is-a part sectional plan taken along the line X-Y in Fig. 1.

In the drawing 1 is the top of a ventilator tube which is provided in a room, from or into which air is to be drawn through the ventilator tube. A circular disc 2 is fixed at the top of the tube, and another circular disc 4 is provided at a distance and parallel to the disc 2 by means of stays 3. 5 is a cylinder of metallic net or lattice with a cover 6 at the top, and is fixed to the disc 4.

Between the cylindricalldiscs 2 and 4 arepro-' vided a series of strips 7 along the periphery as clearly shown in Fig. 2, and each strip can be turned about its axis 8 which is rotatlvely held at both ends in the discs 2 and 4. The Q lower end of each axis 8 has a cross piece 9,

and one end of each cross piece is connected with an end of the cross piece of the nextrearward axis, assuming a counter-clockwise arrangement of the axes piece, by a link 10, while another end of the cross piece is connected with an end of the cross piece of the next forward axis by a link 11, so that all the cross pieces are connected in a series. One of the axes-8 is provided with a controlling spindle 12 which is downwardly extended to the room, where the spindle can be turned by hand. In case one of the axes 8 is turned by the spindle 12, all the axes 8 of the strips 7 are turned through the same angle and in the same direction through the intermediary of the cross pieces 9 and links 10 and 11.

A cylinder 13 of the same diameter as that of the tube 1 is fixed on a spindle 14 by arms 15, and the spindle is verticall held between the discs 2 and 4 on the axial hne of the tube.

The lower bearing 18 for the spindle is held and the top central. part Upon the spindle 14 is provided a helical:

vane 17, and a number of vanes 16 are attached to the outer surface of the cylinder, thus the cylinder, the helical vane and the series of vanes make a rotatable member pivotally held in the bearing 18.

When each strip or guide vane 7 is held in one oblique direction, Wind or .fiow of air enters along the guide vane so that the cylinder will be turned due to the pressure exerted on the vane 16 attached to the cylinder. If the guide vane is turned through a certain angle so as to occupy an oblique direction opposite to the above position relative to the radial line, the pressure of air flow along the guide vane will turn the cylinder in the counter di rection. It is understood that the cylinder 13 can be turned in either direction in spite of a definite flow of air or wind by placing the guide vanes in a proper oblique direction relative to the radial line. This can be easily done by means of the controlling spindle 12, and the flow of air in the ventilator tube can be caused to be either inward or outward. It is obviousthat the cylinder can be stopped altogether merely by closing the guide vanes as shown in Fig. 2.

The link mechanism 9, 10 and 11 for turning the guide vanes can be replaced with another mechanism, for instance, a large internal or external gear commonly meshing with a pinion firmly fixed to the lower end of each axis 8, and the helical vane can be replaced by a number of curved vanes radially fixed to the spindle 14.

. What I claim is 1. A ventilator comprising a revolving fan for drawing air through a ventilator tube by the pressure of wind, comprising vanes attached to the revolving fan, a plurality of guide vanes pivotally mounted about the first mentioned vanes, and a common means for controlling the guide vanes for simultaneously changing their radial angle relative to the longitudinal axis of the revolving fan.

2. A ventilator comprising a revolving fan for drawing air through a ventilator tube by the pressure of wind, comprising vanes attached to the revolving fan, a series of guide vanes pivotally mounted about the saidfirst mentioned vanes, a system of linkage interconnecting the said guide vanes for actuating the latter as a unit, and a control handle for actuating the said linkage system, whereby the radial angle of the guide vanes relative to the longitudinal axis of the revolving fan marylbe simultaneously changed.

testimony whereof I afiix m signature.

- YOSHIO GAWA. 

